[2] Frostbite continues the story of the main character, Rose Hathaway including her bond with Princess Vasilisa "Lissa" Dragomir, her budding romance with her instructor Dimitri Belikov, and her education in becoming a Guardian.

To keep the students at St. Vladimir's Academy safe, a ski trip to a lodge owned by a wealthy Moroi family is required right after Christmas.

During the ski trip, panic sets in when news of another Strigoi attack on a royal Moroi family spreads, where one of the dead was Mia's mother.

Using Rose's information, Mia, Mason, and Eddie sneak out of the ski lodge and travel to Spokane, Washington, to hunt down the Strigoi themselves.

Rose then kills Isaiah and Elena by beheading them with a dull sword in rage from Mason's death, and then collapses into shock, just as Guardians arrive.